A way to unzip .zip files

[Firepixel85]

Describe the project you are working on

An applications installer.

Describe the problem or limitation you are having in your project

The installer needs to download a .zip file from a remote server and then extract it's contents, but there seems to be no way to extract a .zip file.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

Add a method to the FileAccess object that takes in the file path for a .zip file, unzips it and places all its contents in a new file with the same name as the .zip file

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

In GDscript:
FileAccess.unzip(filepath: String)

Example Usecase:

extends Node

func unzip_app():
    FileAcces.unzip("user//application.zip")
    run_app()

func run_app():
    OS.shell_open("user://application/ExampleApp.exe")

If this enhancement will not be used often, can it be worked around with a few lines of script?

As this is a recommendation for GDscript and not Godot this could not be fixed with a script, because GDscript offers no such functionality.

Is there a reason why this should be core and not an add-on in the asset library?

As stated above there is no way to do something like this with an add-on at least to my knowledge.

[AThousandShips]

Is ZIPReader not sufficient? Do you need some specific feature it doesn't cover?

[Firepixel85]

ZIPReader only reads the file. Sadly in my case I need to be able to actually unzip the file. By the way there is a way of doing this in Godot by using OS.execute and the unzip command in bash but i believe there should be an easier way to do this.

[raulsntos]

You should be able to just write the files you read with ZIPReader, here's a quick proof of concept:

var reader := ZIPReader.new()
reader.open("user://application.zip")

# Destination directory.
var root_dir := DirAccess.open("user://")

var files := reader.get_files()
for file_path in files:
    # If the current entry is a directory.
    if file_path.ends_with("/"):
        root_dir.make_dir(file_path)
        continue

    # Write file contents.
    var buffer := reader.read_file(file_path)
    var file := FileAccess.open(root_dir.get_current_dir().path_join(file_path), FileAccess.WRITE)
    file.store_buffer(buffer)

[Firepixel85]

Ok yeah my mistake for not testing the ZIPReader extensively, both my method and @raulsntos work, I'll be it the ladder is easier to pull of. As such I am closing this issue. 🎉